Door Multiplex Control Unit
- Remove driver's door panel. See DOOR PANEL
under REMOVAL & INSTALLATION. Remove power window master switch/driver's door multiplex control unit. Driver's door multiplex control unit is built into power window master switch. Go to next step.
- Disconnect driver's door multiplex control unit 20-pin connector. Inspect connectors and terminals. Check for bent, loose or corroded terminals. Perform driver's door multiplex control unit input tests. See Fig 1
. Repair as necessary and recheck system operation. If driver's door multiplex control unit tests are okay, go to next step.
- Reconnect driver's door multiplex control unit 20-pin connector. Perform input tests as specified at back side of driver's door multiplex control unit 20-pin connector (backprobe). See Fig 2
. Repair as necessary. If all tests are okay, go to next step.
- Substitute a known-good control unit for unit most likely at fault. Recheck system operation. If system operates properly, replace original control unit. If system still malfunctions, replace next most likely unit to be at fault and recheck system operation. Repeat procedure until malfunction no longer exists.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.